Lizards combine stored energy and recently acquired nutrients flexibly to fuel reproduction
Identifieur interne : 008C15 ( Main/Exploration ); précédent : 008C14; suivant : 008C16Lizards combine stored energy and recently acquired nutrients flexibly to fuel reproduction
Auteurs : Daniel A. Warner [Australie] ; Xavier Bonnet [France] ; Keith A. Hobson [Canada] ; Richard Shine [Australie]Source :
- Journal of animal ecology [ 0021-8790 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Combustible, Carbone.
English descriptors
Abstract
1. Energy allocation strategies for reproduction are viewed typically as a continuum between reliance on 'income' (recently acquired energy) vs. 'capital' (stored reserves) for fuelling reproduction. Because ectothermy facilitates long-term energy storage and often involves low feeding rates, traditional views suggest that many ectotherms rely heavily on stored reserves for egg production. 2. We explored the temporal relationship between energy intake and expenditure in a multi-clutching lizard (Amphibolurus muricatus) by evaluating the effect of maternal nutrition on reproductive output and by contrasting δ13C measurements of the maternal diet and endogenous energy stores with that of the eggs produced. 3. Our experiment revealed that females utilize both endogenous energy stores and recently acquired food to fuel reproduction; this pattern did not shift seasonally from first to second clutches produced. Importantly, however, egg lipid was derived primarily from capital, whereas egg protein was derived about equally from both income and capital. 4. Overall, these results suggest that the energy allocation strategy used for reproduction differs among egg components, and that the use of recently acquired energy for reproduction may be more widespread in ectotherms than thought previously.
Affiliations:
- Australie, Canada, France
- Nouvelle-Aquitaine, Nouvelle-Galles du Sud, Poitou-Charentes
- Sydney, Villiers en Bois
- Université de Sydney
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Hobson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Environment Canada, 11 Innovation Boulevard</s1><s2>Saskatoon, Saskatchewan, S7N 3H5</s2><s3>CAN</s3><sZ>3 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Saskatoon, Saskatchewan, S7N 3H5</wicri:noRegion></affiliation></author><author><name sortKey="Shine, Richard" sort="Shine, Richard" uniqKey="Shine R" first="Richard" last="Shine">Richard Shine</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>School of Biological Sciences, University of Sydney</s1><s2>New South Wales 2006</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author></analytic><series><title level="j" type="main">Journal of animal ecology</title><title level="j" type="abbreviated">J. anim. ecol.</title><idno type="ISSN">0021-8790</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of animal ecology</title><title level="j" type="abbreviated">J. anim. ecol.</title><idno type="ISSN">0021-8790</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon</term><term>Fuel</term><term>Isotopes</term><term>Nutrient</term><term>Reproduction</term><term>Sauria</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Nutriment</term><term>Combustible</term><term>Reproduction</term><term>Carbone</term><term>Isotope</term><term>Sauria</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Combustible</term><term>Carbone</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">1. Energy allocation strategies for reproduction are viewed typically as a continuum between reliance on 'income' (recently acquired energy) vs. 'capital' (stored reserves) for fuelling reproduction. Because ectothermy facilitates long-term energy storage and often involves low feeding rates, traditional views suggest that many ectotherms rely heavily on stored reserves for egg production. 2. We explored the temporal relationship between energy intake and expenditure in a multi-clutching lizard (Amphibolurus muricatus) by evaluating the effect of maternal nutrition on reproductive output and by contrasting δ<sup>13</sup>C measurements of the maternal diet and endogenous energy stores with that of the eggs produced. 3. Our experiment revealed that females utilize both endogenous energy stores and recently acquired food to fuel reproduction; this pattern did not shift seasonally from first to second clutches produced. Importantly, however, egg lipid was derived primarily from capital, whereas egg protein was derived about equally from both income and capital. 4. Overall, these results suggest that the energy allocation strategy used for reproduction differs among egg components, and that the use of recently acquired energy for reproduction may be more widespread in ectotherms than thought previously.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Canada</li><li>France</li></country><region><li>Nouvelle-Aquitaine</li><li>Nouvelle-Galles du Sud</li><li>Poitou-Charentes</li></region><settlement><li>Sydney</li><li>Villiers en Bois</li></settlement><orgName><li>Université de Sydney</li></orgName></list><tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Warner, Daniel A" sort="Warner, Daniel A" uniqKey="Warner D" first="Daniel A." last="Warner">Daniel A. Warner</name></region><name sortKey="Shine, Richard" sort="Shine, Richard" uniqKey="Shine R" first="Richard" last="Shine">Richard Shine</name></country><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Bonnet, Xavier" sort="Bonnet, Xavier" uniqKey="Bonnet X" first="Xavier" last="Bonnet">Xavier Bonnet</name></region></country><country name="Canada"><noRegion><name sortKey="Hobson, Keith A" sort="Hobson, Keith A" uniqKey="Hobson K" first="Keith A." last="Hobson">Keith A. Hobson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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